Shaving machine



M 2 1929. w. CLAYBOURN 1;114213 SHAVING MACHINE Filed Sept. 23, 1926 s Sheets-Sheet 5 Patented May 21, 1929.

emu: STA

rust-m w. cLAYiaoUnn, ormwa'uxmi,

Wisconsin.

snav'ms macnnm.

lane-m... filed September 23,1926. serial 110.187365.

My invention relates to shaving machines for shaving printing plates, including socalled electroplates, etchings, stereotypes, and the like. 1

It is the object of my invention to provide a novel arrangement and structure of rotary cutter-head, shaving means and pressure means, so arranged and constructed that the rotary cutter-head reduces the printing plate to proximate thickness, followed by the action of the shaving means, to produce a completely shaved printing plate in novel manner, at a single passage thereof past said cutting devices;' and, further, to provide novel holddown means occupying narrow space adjacent to the rotary cutter-head and arranged to press independently upon the various 1 portions across the printing plate, with pressures to cause allportions of the printing surface of the printing plate to'be brought into the same surface, and to cause uneven portions thereof to be evened'with relation to each other, so that the back of the printing plate will be acted on by the cutting agencies in manner to produce a printing plate of even thickness throughout the areas of its printing surfaces, and to produce a printin plate in which the necessity for make-rea%y.for printing withan even pressure is reduced to the minimum. a

It is the object of my invention, further, to provide novel means whereby to adjust the distances between the rotary cutter-head, the shaving means and the pressure means, and the support for said respective means with relation to each claims, and from the drawings, in which latter:

Fig. 1 is a side elevation of my improveddevice.

Fig. 2 is a front end elevation of the same.

shown, described and claime the printing plate; further," I to provide novel means whereby to adjust p to provide novel means wheretance d, fur- Fig. 3 is a rear end elevation of the same. Fig. 4 is a plan view of my improved device.

v Fig; 5 is a cross-section of the same,'taken on the line 5-5 of Fig. 1, partly broken away. Fig; 6 is a. vertical longitudial section, taken on the line 6-6 of Fig. 4.

Fig. 7 is an enlarged sectional detail of the same,

hold-down means, :partly in section on the line 8-8 of Fig. 1; and,

showing the cutting devices and the hold-down means.

Fig. 9 is a horizontal section of a detail of the same,

In a companion application for patent on improvements in shaving machines, fi ed by me September 21, 1926,'as Serial No. 1 6,841, 'copending herewith, I have shown, described and claimed the travel between the cutting agencies and the support for the printing plate as accomplished by movement of said support and have broadly claimed the means also for obtaining such relative travel, and claimed the species therein shown anddescribed. In the present application I have the travel between the cutting agencies and 'the supportfor the printing plate is accomplished by movement of the cutting agencies.

' In my aforesaid copendin application I have furthermore shown an described the adjustment for adjusting the space between the cutting devices and the support for the printing lates of 'difierent thicknesses, as accomplished by adjustment of said cutting devices and of the hold-down means, and have broad- 5' between the cutting devices and holddown means on the one part and the support for the printing plate on the other part, and also claimed the species therein shown and described. a

The adjustment between the cutting devices and hold-down means on the one part, and the support for the printing plate on the other part, is shown, in the present application as accomplished by means which obtain adjustment of said supl't. In the, present exemplification the frame of the machine is 12 has thereon a supportmg face 13, for the taken on the line 9-9 of Fig. 8.

plate, 1n order to produce printingclaimed the means for adjustment of dis means whereby described and claimed exemplified at 11. A bed 5 I printing plate, exemplified at 14, and forms a table for the printing, plate. The printin' surface of the printing plate is resented toward the supporting face of the ta le. The

decent of the bed.

.wedge-slide, and journaled in a The endwise movement of theslide is shown accomplished by means of a screwrod 25 threaded in a threaded lu 26 on the Jearing- 27 in the end of the main frame. A hand-wheel 28 is fixed to the screw-rod. The screw-rod is. held endwise in the bearing 27 by said hand-wheel at one end .of said bearing 'and a collar 29 fixed tosaid screw-rod at the other end of said bearing. The periphery of the hand-wheel may be provided with a graduated scale 30, with which a finger 31 on the main frame coacts, for indicating the number of turns and part-turns of the hand-wheel for determining the adjustment to height ofthe bed.

A carriage 35 is arranged to travel back and forth lengthwise of the main frame, being guided by guideways 36 between the frame and the carriage. The carriage has on it. a rotary cutter-head 37, a shaving means 38, and hold-downs 39, 40, the latter being shown at the respective sides of the rotary cutter-head, and the hold-down 40. being .shown between the rotary cutter-head and the shaving means. A

The travel of the carriage is shown accomplished by providin the carria e with a threaded nut 41 at eac side thereo in which screw-rods 42 are threaded. Each of the screw-rods is journaled and held endwise in a bearing 43 on the mainframe, and has a spiral gear 44 fixed-thereto.

A cross-shaft 45 is journaled 1n bearings 46 in the main frame, and has s iral gears 47 fixed thereto, which respective y mesh with the spiral gears 44. Suitable means are providedfor rotating the cross-shaft, shown accomplished by means of an electric motorr4il8,

e rotor of the electric motor has a pulley 49 fixed thereto, a so-called silent chain 50 being received about said pulley and a pulley 51 secured to the cross-shaft 45. Suitable knockout means-may be provided for preventing over-travel of'the carriage. I j

The fotarycutter-head 37 is provided with axles 55, journaled in bearings 56 upon the.

the bearing-block at each end of the carriage being slidable in ,a guideway 57 in the carriage.

Hollow adjusting bolts 58 are threaded in threaded lugs 59 on the blocks and bear against the carriage. Clamp-bolts 60 are received through the bores of the bolts 58 and are threaded into the carriage. Jam-nuts 61 about the bolts 58 clamp said bolts and the bearing-block together.-

The cutter-head is suitably rotated, as by means of a belt 66 received over a pulley 67 fixed to one of the axles 55. Directing pulleys 68, 69, are mounted on axles 70,- 71, fixed to the carriage. A pulley 72 is fixed to the cross-shaft 45 at one end of the main frame.

of the pulleys 68, 69, as an upwardly extend-- ing loop 75 and about the pulley 67 on the rotary cutter-head for rotating the latter; As the carriage travels back and forth lengthwise of the main frame, the upwardly extending loop -75 moves progressively along the upper stretch of the loop between the pulleys 72, 73, at the respective ends of the machine, for maintaining driving relation between said belt and the pulley 67 on the rotary cutter-head.

The rotary cutter-head is shown as hav-, ing cutter-blades 81 integral therewith, althrough the cutter-blades may be releasable. The cutter-blades are shown of spiral form. The cutter-blades respectively have a cutting ed e 82, a clearance face 83 in rear thereof, an a guidin face 84 at the front of the cutter-blade. -T is uiding facemay be ground for sharpening t e cutter-blade. The guiding face dguides or directs the chips and shavings ma e by the rotary cutter-head so as to clear the printing plate and the cutter-head.

Shaving means coactwith the rotary cutter and are shown as a shaving knife 85, which may be termed a fixed knife, in contradistinction to the rotary cutter-head, and is fixed in position relative to the axis of rotation of the rotary cutter head. The shaving knife is arranged to bear upon the rear face of the rinting plate. The bearing face is a narrow t facewhich holds all portions of the printing plate adjacent to the cutting edge down ward to prevent gouging of the printing plate and sm ths-the rear surface of the printing plate and polishes the same. There is a receding face 88 in rear of the bearing face, which receding face recedes .awayfrom the plane of the printing plate for formin a clearance s ace 89 between the printing p ate and the b0 y of the shaving knife.

The front end of the shaving knife includes a directing face 90, which aids in directing thedlrection in which the shavings and chi s from the backvof the printing. plate by the cutting edge 82, shall curl, for ready release:

and discharge of said shavings and chips. This directing face is so shaped as to permit quite close approachbetween the shaving edge of the shaving means and the point of coaction between the adjacent pressure means and the'printing plate. The grinding of the shaving knife for sharpening thesame preferably takes place upon the bearing face 87. Means are provided for adjusting the shaving knife, shown as comprising adjustable resistance screws 95, threaded in threaded holes 96 in a cross-piece 97 of the carriage, and clamp bolts 98, received in threaded holes in the fixed knife and extending through slots 99 in said CIOSS'P BCQ. Washers 100 are received between the heads of said bolts and said cross-piece} Backing bolts 101 may also beprovided, the same being threaded in threaded holes 102 in the cross-piece 97, and secured in adjusted positions by jam-nuts 103. 'These backing olts are used for the purpose of adjusting the distance of the shaving knife with relation to the path of rotation of the cutting edges of the rotary cutter-head.

' When adjusting the fixed knife, the clamp bolts 98 are partly relieved, and the adjusting screws 95 adjusted, for-causing a proach .or recession of the cutting edge 0 the fixed knife with relation to the plane of the support of the printing-plate, and the backing bolts 101. ad usted, for ad usting the fixed lmife with relation to the rotary cutter-head,

l whereupon the clamp bolts 98 are clamped 7 proximate thickness of theprinting theshaving means perform the precision 'cutting for finished thickness of the printing The thickness of the shaving pro for holding the fixed knife in adjusted posi- 'I he rotary cutter-head and the shaving means form cutting agencies for the rear face of the printing plate forreducing the printing plate to the desired thickness. The rotary cutter-head does the rough cutting for plate and plate. duced 'by the shaving means is determined by the relative adjustment to elevation .of the rotary cutter-head and the fixed knife. The thickness ofthe printing plate is determined by the adjustment of the bed.

evenness there may face,

preferably all printing surface 111130 parallelism with the and iron out all unbe in said printing surcaused for instance by depressions, exemplified at 104, therein,-so as to bring the printing lines in the whole of said printing surface into parallelism with said supporting surface, so that when the cutting agencies have coacted with the printing plate, the body of the printing plate will be so cut as to have an even thickness throughout its printing portions.

The hold-down means are exemplified as acting in close proximity to the rotary cutterhead in advance of the rotary cutter-head, and hold-down means are exemplified as acting in close proximity to the rotary cuttersupportmg surface,

a head at the feed-out side of the latter, and in close proximity to the feeding-in side of the shaving means.

The hold-down means are exemplified as rollers 111, journaled on pins 112, flxed in the tines of forks 113. These forks and roll- "ers are preferably arranged close together I end to end across the plate supporting surface of said bodies 'in said bores is prevented by having flat faces 122 between said bodies and the walls of said bores. v

Adjustments of the plugs 120 and nuts 121 adjust the tensions of the springs and the. limit of outward movements of the pressure rollers toward the supporting surface of the printing plate, whereby the relation of the pressure rollers to theprinting surface and the pressure of the pressure rollers upon the rinting' plate are adjusted. Separate. adustments of the rollers are thus provided.

it If it is desired to collectively adjust the rollers, the cross-bar 116 is adjusted so as to cause approach or recession of all of the rollers with relation to the printing plate. This cross-bar is provided with tongues 125 at its respective ends received in grooves 126 in the respective sides of thecarriage 35. Adjusting bolts 127 are rotatable andvheld endwise in bearings 128 of lugs 129 extending from the frame of the carriage. These adjusting bolts are threaded in the cross-bar at the respective ends of the latter. Clamp bolts 130 are threaded in said lugs and are arranged to bear upon the cross-bar at its 0 threaded for receiving nuts 121. Turnwhat I claim as new,

' travel therebetween,

respective ends for-holding the same in ad'- justed positions. v

The hold-down means 39 are similar to the hold-down means 40, with the exception that the parts are reversed with relation to the rotary cutter-head, The forks of said respective ,hold-down meansand the rollers therein are projected under the cylindrical path of rotation of the cutting edges of the cutter-head, into close proximity to the line of cutting action between the cutter-head and the printing plate. The parts of the hold-down 39 are designated by reference numerals similar to those'of the respective parts of the hold-down-40, but raised to the series 200.

I do not in this application broadly claim the adjusting relation of the rotary cutterhead and shaving means and hold-down means with relation to each other and-to the supportfor the printing plate, or the means for causing travel between said cutting agencies and the printing plate, having broadly claimed the same in my said copending ap plication for patent Serial No. 136,841, filed September 21, 1926, but do herein claim the species of such adjustments and means for travel herein shown and described.

While I have shown the cutting agencies and hold-down means coacting with a support fora printing plate having right line it is obvious that said cutting devices and hold-down means may coact with a supporting face formed as the sector of a cylinder, for instance for coacting with curved printing plates.

Having thus fully described my invention, and desire to'secure by Letters Patent, is:

1. In a printing plate shaving machine, the combination of a support for the printing plate, a rotary cutter-head and shaving means coacting with said support, sectional hold-down means at each side of said rotary cutter-head and between said rotary cutterhead and said shaving means, said rotary cutter-head, shaving means and sectional hold-down means located in close *juxta'position lengthwise of the machine and-all opcrating on the same portions of the back of the printing plate, and means for causing travel between said support and said rotary cutter-head, shaving means and hold-down means. t

2. In a printing plate shaving machine, the combination of a support for the printing plate, a rotary cutter-head and shaving means for the printing plate coacting with said support, sectional hold-down means between said rotary cutter-head and said shaving means, said sectional hold-down means extendingunder the,cylinder of the path of rotation of the cutting edges of said rotary cutter-head, said shaving means extending- -under said hold-down means, and means for causing travel between said support and said rotary cutter-head, shaving means. and holddown means.

3. In a printing plate shaving machine, the combination of a support for the printing plate, a rotary cutter-head and shaving means for the printing plate coacting with said support, sectional hold-down means between said rotary cutter-head and said shaving means, said sectional hold-down means extending under the cylinder of the "path of rotationof the cutting edges of said rotary cutter-head, said shaving means extending under said hold-down means, means permitting independent movement of the respective sections of said sectional hold-down means in paths substantially perpendicular to said support, and means for causing travel between said support and said rotary cutterhead, shaving means and hold-down means. 4. In a printing plate shaving machine, the combination of a support for the printing plate, a rotary cutter-head and. shaving means for the printing plate coacting with said support, hold-down means at the respective sides of said rotary cutter-head and between said rotary cutter-head and said shaving means, said hold-down means comprising pressure devices presented toward each other at the respective sides of said rotary cutterhead and extending under the cylinder of the path of rotation of the cutting edges of said rotary cutter-head, each of said hold-down means comprising independent hold-down parts arranged side by side lengthwise of said rotary cutter-head; and said shaving means extending under said hold-down means which are located between said rotary cutterhead and said shaving means, and means for causing travel between said support and said rotary cutter-head, shaving means and holddown means.

5. In a printing plate shaving machine, the combination of a support for the printing plate, a rotary cutter-head and shaving means for the printing plate coacting with said support, sectional hold-down means between said rotary cutter-head and said shaving means, said sectional hold-down means extending under the cylinder of the path of rotation of the cutting edges of said rotary cutter-head and said shaving means extending under said hold-down means, a support for said sectional I orting table on said frame, means for adusting said table on said frame, a carria e; a rotary cutter-head, shaving means an resiliently acting sectional hold-down means coacting with said'table and mounted on said carriage, a pulley on said carriage for said rotary cutter-head, direction pulleys on'said carriage, pulleys at the respective ends of said frame, a driving belt received about said last-named pulle s and comprising a'stretch received about t e proximate faces of said direction pulleys and about said first-named pulley, and means for causing travel of said carriage on said frame with relation to said table.

7 In a printing plate shaving machine, the

combination of a frame, a printing plate sup-- porting table on said-frame, a carriage on said frame, a rotary cutter-head journaled on said carriage, shaving means on said carriage at the side of said rotary cutter-head, hold-down means on said carriage at the ,side ofsaid rotary cutter-head, a justing means on said carriage for ad] usting sald rotary cutterhead. said shaving means and said hold-down means inde endently for distance relation I with said ta 1e, and means for adjusting said table for distance relation with said rotary cutter-head,. said shaving means and said hold-down means, and means for causing travel of said carriage. 8. In a printing p ate shaving machine, the combination of a support for the printing plate, a rotary cutter-head and shaving means coacting with said support, sectional holddown means alongside said rotary cutterhead, said sectional hold-down means comprising a bar extending lengthwise of said cutter-head, said bar provided with bores arranged side by side in said bar, spring-pressed plun ers in saidbores, said plungers provided with printing plate contact means for pressing said printing plate toward said. support, and means for causing travel between said support and said rotary cutter-head, shaving means and hold-down means;

In testimony whereof, I have hereunto signed my name.

LESLIE w. ICLA'YBQURN. 

